tigrbl_engine_pgsqli_wal 0.1.1.dev20

PostgreSQL and SQLite WAL engine plugin for Tigrbl (auto-registered via entry points).

tigrbl_engine_pgsqli_wal

Tigrbl engine plugin providing two engines:

• postgres_wal — PostgreSQL via SQLAlchemy + psycopg3
• sqlite_wal — SQLite with WAL mode enabled via connection PRAGMAs

The package auto-registers with Tigrbl through the tigrbl.engine entry-point group.

Install

pip install -e .

Usage (inside Tigrbl)

from tigrbl.engine import Engine
from tigrbl.engine.engine_spec import EngineSpec

# PostgreSQL (DSN or mapping)
spec = EngineSpec(kind="postgres_wal", dsn="postgresql+psycopg://user:pwd@host:5432/db?application_name=tigrbl")

# Or with mapping (the plugin builds the URL)
spec = EngineSpec(kind="postgres_wal", mapping={
  "host": "127.0.0.1", "port": 5432, "user": "user", "pwd": "pwd", "db": "db",
  "application_name": "tigrbl", "pool_size": 10, "max_overflow": 20
})

# SQLite (file path required for WAL)
spec = EngineSpec(kind="sqlite_wal", mapping={"path": "/path/to/db.sqlite", "pool_size": 5})

engine = Engine(spec)
with engine.session() as s:
    s.execute("select 1").all()

Notes:

• PostgreSQL WAL is a server feature; this plugin tunes connection/session parameters only.
• SQLite WAL is enabled via PRAGMA journal_mode=WAL on each new connection.